William s



2 SheetsSheet 1.

W. S. HADAWAY,J1-.& W. E. DAVIS.

' HEATER.

N0. 553,308. Patented Jan. 21, 1896,

(No Model.)

ATTORNEYS 2 Sheets-Sheet 2. W. S. HADAWAY, Jr. 86 W. E. DAVIS. HEATER.

(No Model.)

No. 553,308. Patented Jan. 21, 1896.

I I I M1111 omn. j (mdawmg G) Wdh mE QWis INVENTDRS WITNESSES:

A TTOHNEYQ UNITED STATES PATENT OFFICE.

IVILLIAM S. IIADAlVAY, JR, OF BOSTON, AND \VILLIAM E. DAVIS, OF

MALDEN, MASSACHUSETTS, ASSIGNORS TO THE CENTRAL ELEC- TRIC HEATINGCOMPANY, OF NEIV YORK, N. Y.

H EATER.

SPECIFICATION forming part of Letters Patent No. 558,308, dated January21 1896.

Application filed November 22,1894:- Serial No. 529,563. (N0 model.)

To CLZZ whom, it may concern.-

Be it known that we, \VILLIAM S. IIADAWAY, -Ir., a resident of Boston,in the county of Suffolk, and WILLIAM E. DAVIS, a resident of Malden, inthe county of Middlesex, State of Massachusetts, citizens of the UnitedStates, have invented certain new and useful Improvements in Heaters, ofwhich the following is a full, true, and accurate description, referencebeing had to the accompanying drawings, wherein similar letters refer tolike parts in the several views.

Our invention relates to that class of heaters wherein a vesselcontaining the material to be melted or otherwise treated is placed in achamber adapted to contain a fluid to be heated, so as to be partlyimmersed therein, the method of treating the material being to applyheat to the fluid or the chamber containing it, instead of subjectingthe vessel containing the material to be treated directly to the heat.

Referring to the accompanying drawings, Figure 1 is a perspective viewof one form of our heater arranged for use with a glue-pot and with theglue-pot removed therefrom. Fig. 2 is a view of a preferred form ofheatin g device, by the employment of which electricity is utilized forgenerating heat; and Fig. 3 is a sectional view of our heater and of theelectric heating-coil and glue-pot.

A is a chamber adapted to contain the fluid to be heated. Bis an annularreservoir sur-' rounding the same, and C C C are short metallic pipesconnecting chamber A and reservoir B.

D is an electric heating-coil (particularly shown in Fig. 2) removablefrom the chamber A.

E is the pot containing glue.

F is an annular ring resting on the inner ec ge of chamber A andsupporting pot E.

G G are the resistance-wires of the electric heatingcoil. H is theinsulated handle 'of such coil.

I is a flexible braided jacket for the terminals of the wires G. Y

J is the supply-opening of the reservoir. K is a cap for closing suchopening.

L L are metallic pieces to assist the pipes C in supporting thereservoir.

M is a petcock for lowering the level of the fluid in chamber A.

N is the flange of the containing-chamber.

To use the illustrated heater to melt or 0therwise treat materialsuch asglue, for example-the heating-coil is first placed in the chamber. Thepot E containing the material to be treated is then seated in thechamber. Fluid is then poured into the reservoir through thesupply-opening J until both the reservoir and chamber are nearly filled,and the screw-cap K is replaced. The level of the fluid in the chamber Ais then preferably drawn down by opening the petcock M or otherwiseuntil it is about the level of the connecting-pipes C. The opening Jhaving been closed by cap K this lowering of fluidlevel in chamber Adoes not affect the level of fluid in reservoir B. The fluid in thechamber is then heated in the device illustrated upon the passage of anelectric current through the resistance-wires of the coil D. As thefluid in chamber A evaporates, it is replacedby fluid flowing in fromthe annular reservoir through the connecting-pipes, and when thefluid-level in the chamber Ais at a point where it covers the outlets ofthese connecting-pipes the flow from the reservoir ceases. Thus thepractical effect is to keep a substantially constant level of fluid inthe chamber A at about the level of the connecting-pipes C.

The pot E may be lifted from the waterholder and the heating of thewater be continued or, if desired, the pot may be removed to anotherplace by means of the heater, using it as a heating-handle, the flange Nresting upon the coils of the heater. The material in the pot will thusbe kept in a liquefied c011- dition while it is removed from thewaterholder.

In the heating-coil shown the resistancewires G G are embedded in orsurrounded by insulating material, and these wires may be coiled orreflexed or inserted in the tubes in any suitable way. Other forms ofelectric heaters may, if desired, be advantageously employed.

One advantage of the employment of a submerged heater Within the chamberresides in the fact that only the liquid in the holder is heated, andthe pot is protected from the direct action of the heat. The heaterbeing readily removable it may be used with another pot, or for anotherpurpose, if desired, and if the resistance wires are broken or burnedout another heater may be put in the pot in the place of the uselessone. Ne desire, also, to call attention to another advantageous featureof our invention. The pot is surrounded by the heater, and thecombination of the parts is such that,when desired, the heater and pot Ecan be removed together, and this will be found useful when desiring touse the glue at another part of the room and to keep it liquefied whileusing. For this purpose the use of an electric heater is especiallyadvantageous, permitting the carrying of the heater to different partsof the room, and an electric heater may be controlled by simple means,whereby the degree of heat may be regulated.

\Vhile we have shown and described the arrangement of parts which weconsider best adapted to secure the desired result, yet we do not desireto be understood as confining ourselves to that exact arrangement, asmod ifieations thereof which embody our invention may suggestthemselves.

hat we claim is- The combination of a liquid-holder, and a vesselremovably suspended in said holder, with a heater within said holder andremovable therefrom, said heater surrounding said vessel, and adapted,when removed, to serve as a heating handle for the vessel, substantiallyas and for the purpose described.

In witness whereof we have hereunto signed our names this 13th day ofNovember, 189%.

\VILLTAM S. HADAVAY, VILLIANI E. DAVIS.

I In presence of WILLIAM A. HAYES, 2d, TILLIAM E. lIUTcHINs.

